pupil gets bigger then smaller in left eye been diagnosed with

Customer Question

Hello and thanks for your question. Depending on whether there is any problems with the movements of the eyes, drooping of the eyelids or other symptoms, a mild difference in the size of the pupils is usually a benign (harmless) finding.

The cause of the difference in dilation can be a normal variant but it can also be a damaged nerve that is responsible for pupil function as well as moving the eye in certain directions or it could be a malfunctioning sympathetic nervous system nerve either in the head, neck or chest.

Unfortunately because the signs of these are subtle only an ophthalmologist or neurologist can distinguish whether this is a normal variant or one of these problems.

If the size difference is no more than 2mm at any one time and is not accompanied by headache or eye pain, a droopy eyelid, changes in vision, double vision or other neurological symptoms then it is likely benign. If this is not the case then I would recommend seeing your eye doctor.

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My opinion is solely informative and does not constitute a formal medical opinion or recommendation. For a formal medical opinion and/or recommendation you must see an eye doctor.